Bituminous cement.



I No Drawing.

UNITED STATES PATENT OFFICE.

JOSEPH HAY AMIES, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE AMIES ASPHALT COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A GOBPOBATION OF SOUTH DAKOTA.

Specification of lietters' Patent. Batented Sept, 2 8, 1909, Application filed February 20, 1909. Serial No. 479,257. I i

tity of calcium oxid and crush it.. I also take a quantity of bituminous or resinous.

elements and heat them. It is preferable not to add water to the pulverized calcium oxid but unite it to the hot bituminous or resinous elements in a dry condition.

quantity of heated mineral matters or the like is mixed therewith. It would defeat my pur ose-to start the calcium oxid to slake be ore the mineral matters are added and mixed therewith. The bituminous elements may preferably be mixed with the mineral materials before the dry calcium oxid is mixed in, because the hot'bituminous or resinous elements would then thicken and stiffen to such an extent, that a due amount of mineral matters could not be mixed with the said elements. I use referably heated mineral elements because t e mixing is much more efiective and a due quantity thereof may be used, but I can use the mineral matters in a cold state and I may dampen the calcium oxid with water, providedI add the mineral matter and the calcium oxid to the bituminous or resinous elements at the same time. I do this in order to secure the mixing before the calcium oxid canfactupon As soon as it can be well stirred in, a batch and a 'suflicient amount of calcium oxid is used to take up. and convert the water and the volatile oil' of the said bituminous or resmous elements. I may mix the bituminous or resinous elements together in the said employment. I have found that the best results may be obtained by adding the calcium oxid in a dry state to the hot bituminous or resinous elements and. at once adding the heated mineral or like elements and quickly stirring them together; In this way I have been enabled to use a .due quantity of mineral elements.

Carbonate of lime 'is used in bituminous cements but the action of carbonate of lime and .calclum oxid uponbituminous or resinous cements is different and different effectsresult. For my purpose calcium oxid is essential.

What I claim is 1. The herein described process of. makmg a composition for paving and like purposes which consists in mixing together crushed calcium oxid, mineral elements,

heated bituminous and resinous materials the said crushed calcium oxid being mixed with the mass while in a dry state and bestantially as described. I

2. The herein described method of makinga composition for paving and like purposes fore the calcium oxid begins to slake, subwhich consists in mixing together mineral matters and the like, bituminous and resinous materlals, crushed. calcium oxid and water the said crushed calcium oxid and water being mixed with the mass 'be'fore slakihg takes place, substantially as .de- 

